module Sequel::Model::InstanceMethods

Sequel::Model instance methods that implement basic model functionality.

Attributes

_insert_values[R]

The hash of attribute values. Keys are symbols with the names of the underlying database columns. The returned hash is a reference to the receiver's values hash, and modifying it will also modify the receiver's values.

Artist.new(name: 'Bob').values # => {:name=>'Bob'}
Artist[1].values # => {:id=>1, :name=>'Jim', ...}
to_hash[R]

The hash of attribute values. Keys are symbols with the names of the underlying database columns. The returned hash is a reference to the receiver's values hash, and modifying it will also modify the receiver's values.

Artist.new(name: 'Bob').values # => {:name=>'Bob'}
Artist[1].values # => {:id=>1, :name=>'Jim', ...}
values[R]

The hash of attribute values. Keys are symbols with the names of the underlying database columns. The returned hash is a reference to the receiver's values hash, and modifying it will also modify the receiver's values.

Artist.new(name: 'Bob').values # => {:name=>'Bob'}
Artist[1].values # => {:id=>1, :name=>'Jim', ...}

Public Class Methods

new(values = {}) { |self| ... } click to toggle source

Creates new instance and passes the given values to set. If a block is given, yield the instance to the block.

Arguments:

values

should be a hash to pass to set.

Artist.new(name: 'Bob')

Artist.new do |a|
  a.name = 'Bob'
end
# File lib/sequel/model/base.rb, line 1057
def initialize(values = {})
  @values = {}
  @new = true
  @modified = true
  initialize_set(values)
  _changed_columns.clear
  yield self if block_given?
end

Public Instance Methods

==(obj) click to toggle source

Alias of eql?

# File lib/sequel/model/base.rb, line 1094
def ==(obj)
  eql?(obj)
end
===(obj) click to toggle source

If pk is not nil, true only if the objects have the same class and pk. If pk is nil, false.

Artist[1] === Artist[1] # true
Artist.new === Artist.new # false
Artist[1].set(:name=>'Bob') == Artist[1] # => true
# File lib/sequel/model/base.rb, line 1104
def ===(obj)
  pk.nil? ? false : (obj.class == model) && (obj.pk == pk)
end
[](column) click to toggle source

Returns value of the column's attribute.

Artist[1][:id] #=> 1
# File lib/sequel/model/base.rb, line 1069
def [](column)
  @values[column]
end
[]=(column, value) click to toggle source

Sets the value for the given column. If typecasting is enabled for this object, typecast the value based on the column's type. If this is a new record or the typecasted value isn't the same as the current value for the column, mark the column as changed.

a = Artist.new
a[:name] = 'Bob'
a.values #=> {:name=>'Bob'}
# File lib/sequel/model/base.rb, line 1081
def []=(column, value)
  # If it is new, it doesn't have a value yet, so we should
  # definitely set the new value.
  # If the column isn't in @values, we can't assume it is
  # NULL in the database, so assume it has changed.
  v = typecast_value(column, value)
  vals = @values
  if new? || !vals.include?(column) || v != (c = vals[column]) || v.class != c.class
    change_column_value(column, v)
  end
end
autoincrementing_primary_key() click to toggle source

The autoincrementing primary key for this model object. Should be overridden if you have a composite primary key with one part of it being autoincrementing.

# File lib/sequel/model/base.rb, line 1119
def autoincrementing_primary_key
  primary_key
end
cancel_action(msg=nil) click to toggle source

Cancel the current action. Should be called in before hooks to halt the processing of the action. If a msg argument is given and the model instance is configured to raise exceptions on failure, sets the message to use for the raised HookFailed exception.

# File lib/sequel/model/base.rb, line 1127
def cancel_action(msg=nil)
  raise_hook_failure(msg)
end
changed_columns() click to toggle source

The columns that have been updated. This isn't completely accurate, as it could contain columns whose values have not changed.

a = Artist[1]
a.changed_columns # => []
a.name = 'Bob'
a.changed_columns # => [:name]
# File lib/sequel/model/base.rb, line 1138
def changed_columns
  _changed_columns
end
delete() click to toggle source

Deletes and returns self. Does not run destroy hooks. Look into using destroy instead.

Artist[1].delete # DELETE FROM artists WHERE (id = 1)
# => #<Artist {:id=>1, ...}>
# File lib/sequel/model/base.rb, line 1147
def delete
  raise Sequel::Error, "can't delete frozen object" if frozen?
  _delete
  self
end
destroy(opts = OPTS) click to toggle source

Like delete but runs hooks before and after delete. Uses a transaction if use_transactions is true or if the :transaction option is given and true.

Artist[1].destroy # BEGIN; DELETE FROM artists WHERE (id = 1); COMMIT;
# => #<Artist {:id=>1, ...}>
# File lib/sequel/model/base.rb, line 1159
def destroy(opts = OPTS)
  raise Sequel::Error, "can't destroy frozen object" if frozen?
  checked_save_failure(opts){checked_transaction(opts){_destroy(opts)}}
end
each(&block) click to toggle source

Iterates through all of the current values using each.

Album[1].each{|k, v| puts "#{k} => #{v}"}
# id => 1
# name => 'Bob'
# File lib/sequel/model/base.rb, line 1169
def each(&block)
  @values.each(&block)
end
eql?(obj) click to toggle source

Compares model instances by values.

Artist[1] == Artist[1] # => true
Artist.new == Artist.new # => true
Artist[1].set(:name=>'Bob') == Artist[1] # => false
# File lib/sequel/model/base.rb, line 1178
def eql?(obj)
  (obj.class == model) && (obj.values == @values)
end
errors() click to toggle source

Returns the validation errors associated with this object. See Errors.

# File lib/sequel/model/base.rb, line 1184
def errors
  @errors ||= errors_class.new
end
exists?() click to toggle source

Returns true when current instance exists, false otherwise. Generally an object that isn't new will exist unless it has been deleted. Uses a database query to check for existence, unless the model object is new, in which case this is always false.

Artist[1].exists? # SELECT 1 FROM artists WHERE (id = 1)
# => true
Artist.new.exists?
# => false
# File lib/sequel/model/base.rb, line 1198
def exists?
  new? ? false : !this.get(SQL::AliasedExpression.new(1, :one)).nil?
end
extend(mod) click to toggle source

Ignore the model's setter method cache when this instances extends a module, as the module may contain setter methods.

Calls superclass method
# File lib/sequel/model/base.rb, line 1204
def extend(mod)
  @singleton_setter_added = true
  super
end
freeze() click to toggle source

Freeze the object in such a way that it is still usable but not modifiable. Once an object is frozen, you cannot modify it's values, #changed_columns, errors, or dataset.

Calls superclass method
# File lib/sequel/model/base.rb, line 1212
def freeze
  values.freeze
  _changed_columns.freeze
  unless errors.frozen?
    validate
    errors.freeze
  end
  this if !new? && model.primary_key
  super
end
hash() click to toggle source

Value that should be unique for objects with the same class and pk (if pk is not nil), or the same class and values (if pk is nil).

Artist[1].hash == Artist[1].hash # true
Artist[1].set(name: 'Bob').hash == Artist[1].hash # true
Artist.new.hash == Artist.new.hash # true
Artist.new(name: 'Bob').hash == Artist.new.hash # false
# File lib/sequel/model/base.rb, line 1230
def hash
  case primary_key
  when Array
    [model, !pk.all? ? @values : pk].hash
  when Symbol
    [model, pk.nil? ? @values : pk].hash
  else
    [model, @values].hash
  end
end
id() click to toggle source

Returns value for the :id attribute, even if the primary key is not id. To get the primary key value, use pk.

Artist[1].id # => 1
# File lib/sequel/model/base.rb, line 1245
def id
  @values[:id]
end
inspect() click to toggle source

Returns a string representation of the model instance including the class name and values.

# File lib/sequel/model/base.rb, line 1251
def inspect
  "#<#{model.name} @values=#{inspect_values}>"
end
keys() click to toggle source

Returns the keys in values. May not include all column names.

Artist.new.keys # => []
Artist.new(name: 'Bob').keys # => [:name]
Artist[1].keys # => [:id, :name]
# File lib/sequel/model/base.rb, line 1260
def keys
  @values.keys
end
lock!(style=:update) click to toggle source

Refresh this record using for_update (by default, or the specified style when given) unless this is a new record. Returns self. This can be used to make sure no other process is updating the record at the same time.

If style is a string, it will be used directly. You should never pass a string to this method that is derived from user input, as that can lead to SQL injection.

A symbol may be used for database independent locking behavior, but all supported symbols have separate methods (e.g. for_update).

 a = Artist[1]
 Artist.db.transaction do
   a.lock!
   a.update(:name=>'A')
 end

a = Artist[2]
Artist.db.transaction do
  a.lock!('FOR NO KEY UPDATE')
  a.update(:name=>'B')
end
# File lib/sequel/model/base.rb, line 1287
def lock!(style=:update)
  _refresh(this.lock_style(style)) unless new?
  self
end
marshallable!() click to toggle source

Remove elements of the model object that make marshalling fail. Returns self.

a = Artist[1]
a.marshallable!
Marshal.dump(a)
# File lib/sequel/model/base.rb, line 1297
def marshallable!
  @this = nil
  self
end
modified!(column=nil) click to toggle source

Explicitly mark the object as modified, so save_changes/update will run callbacks even if no columns have changed.

a = Artist[1]
a.save_changes # No callbacks run, as no changes
a.modified!
a.save_changes # Callbacks run, even though no changes made

If a column is given, specifically marked that column as modified, so that save_changes/update will include that column in the update. This should be used if you plan on mutating the column value instead of assigning a new column value:

a.modified!(:name)
a.name.gsub!(/[aeou]/, 'i')
# File lib/sequel/model/base.rb, line 1317
def modified!(column=nil)
  _add_changed_column(column) if column
  @modified = true
end
modified?(column=nil) click to toggle source

Whether this object has been modified since last saved, used by #save_changes to determine whether changes should be saved. New values are always considered modified.

a = Artist[1]
a.modified? # => false
a.set(name: 'Jim')
a.modified? # => true

If a column is given, specifically check if the given column has been modified:

a.modified?(:num_albums) # => false
a.num_albums = 10
a.modified?(:num_albums) # => true
# File lib/sequel/model/base.rb, line 1337
def modified?(column=nil)
  if column
    changed_columns.include?(column)
  else
    @modified || !changed_columns.empty?
  end
end
new?() click to toggle source

Returns true if the current instance represents a new record.

Artist.new.new? # => true
Artist[1].new? # => false
# File lib/sequel/model/base.rb, line 1349
def new?
  defined?(@new) ? @new : (@new = false)
end
pk() click to toggle source

Returns the primary key value identifying the model instance. Raises an Error if this model does not have a primary key. If the model has a composite primary key, returns an array of values.

Artist[1].pk # => 1
Artist[[1, 2]].pk # => [1, 2]
# File lib/sequel/model/base.rb, line 1359
def pk
  raise(Error, "No primary key is associated with this model") unless key = primary_key
  if key.is_a?(Array)
    vals = @values
    key.map{|k| vals[k]}
  else
    @values[key]
  end
end
pk_hash() click to toggle source

Returns a hash mapping the receivers primary key column(s) to their values.

Artist[1].pk_hash # => {:id=>1}
Artist[[1, 2]].pk_hash # => {:id1=>1, :id2=>2}
# File lib/sequel/model/base.rb, line 1373
def pk_hash
  model.primary_key_hash(pk)
end
qualified_pk_hash(qualifier=model.table_name) click to toggle source

Returns a hash mapping the receivers qualified primary key column(s) to their values.

Artist[1].qualified_pk_hash
# => {Sequel[:artists][:id]=>1}
Artist[[1, 2]].qualified_pk_hash
# => {Sequel[:artists][:id1]=>1, Sequel[:artists][:id2]=>2}
# File lib/sequel/model/base.rb, line 1383
def qualified_pk_hash(qualifier=model.table_name)
  model.qualified_primary_key_hash(pk, qualifier)
end
refresh() click to toggle source

Reloads attributes from database and returns self. Also clears all #changed_columns information. Raises an Error if the record no longer exists in the database.

a = Artist[1]
a.name = 'Jim'
a.refresh
a.name # => 'Bob'
# File lib/sequel/model/base.rb, line 1395
def refresh
  raise Sequel::Error, "can't refresh frozen object" if frozen?
  _refresh(this)
  self
end
reload() click to toggle source

Alias of refresh, but not aliased directly to make overriding in a plugin easier.

# File lib/sequel/model/base.rb, line 1402
def reload
  refresh
end
save(opts=OPTS) click to toggle source

Creates or updates the record, after making sure the record is valid and before hooks execute successfully. Fails if:

  • the record is not valid, or

  • before_save returns false, or

  • the record is new and before_create returns false, or

  • the record is not new and before_update returns false.

If save fails and either raise_on_save_failure or the :raise_on_failure option is true, it raises ValidationFailed or HookFailed. Otherwise it returns nil.

If it succeeds, it returns self.

Takes the following options:

:changed

save all changed columns, instead of all columns or the columns given

:columns

array of specific columns that should be saved.

:raise_on_failure

set to true or false to override the current raise_on_save_failure setting

:server

set the server/shard on the object before saving, and use that server/shard in any transaction.

:transaction

set to true or false to override the current use_transactions setting

:validate

set to false to skip validation

# File lib/sequel/model/base.rb, line 1431
def save(opts=OPTS)
  raise Sequel::Error, "can't save frozen object" if frozen?
  set_server(opts[:server]) if opts[:server] 
  unless checked_save_failure(opts){_valid?(opts)}
    raise(ValidationFailed.new(self)) if raise_on_failure?(opts)
    return
  end
  checked_save_failure(opts){checked_transaction(opts){_save(opts)}}
end
save_changes(opts=OPTS) click to toggle source

Saves only changed columns if the object has been modified. If the object has not been modified, returns nil. If unable to save, returns false unless raise_on_save_failure is true.

a = Artist[1]
a.save_changes # => nil
a.name = 'Jim'
a.save_changes # UPDATE artists SET name = 'Bob' WHERE (id = 1)
# => #<Artist {:id=>1, :name=>'Jim', ...}
# File lib/sequel/model/base.rb, line 1450
def save_changes(opts=OPTS)
  save(Hash[opts].merge!(:changed=>true)) || false if modified? 
end
set(hash) click to toggle source

Updates the instance with the supplied values with support for virtual attributes, raising an exception if a value is used that doesn't have a setter method (or ignoring it if strict_param_setting = false). Does not save the record.

artist.set(name: 'Jim')
artist.name # => 'Jim'
# File lib/sequel/model/base.rb, line 1461
def set(hash)
  set_restricted(hash, :default)
end
set_fields(hash, fields, opts=nil) click to toggle source

For each of the fields in the given array fields, call the setter method with the value of that hash entry for the field. Returns self.

You can provide an options hash, with the following options currently respected:

:missing

Can be set to :skip to skip missing entries or :raise to raise an Error for missing entries. The default behavior is not to check for missing entries, in which case the default value is used. To be friendly with most web frameworks, the missing check will also check for the string version of the argument in the hash if given a symbol.

Examples:

artist.set_fields({name: 'Jim'}, [:name])
artist.name # => 'Jim'

artist.set_fields({hometown: 'LA'}, [:name])
artist.name # => nil
artist.hometown # => 'Sac'

artist.name # => 'Jim'
artist.set_fields({}, [:name], missing: :skip)
artist.name # => 'Jim'

artist.name # => 'Jim'
artist.set_fields({}, [:name], missing: :raise)
# Sequel::Error raised
# File lib/sequel/model/base.rb, line 1491
def set_fields(hash, fields, opts=nil)
  opts = if opts
    Hash[model.default_set_fields_options].merge!(opts)
  else
    model.default_set_fields_options
  end

  case missing = opts[:missing]
  when :skip, :raise
    do_raise = true if missing == :raise
    fields.each do |f|
      if hash.has_key?(f) 
        set_column_value("#{f}=", hash[f])
      elsif f.is_a?(Symbol) && hash.has_key?(sf = f.to_s)
        set_column_value("#{sf}=", hash[sf])
      elsif do_raise
        raise(Sequel::Error, "missing field in hash: #{f.inspect} not in #{hash.inspect}")
      end
    end
  else
    fields.each{|f| set_column_value("#{f}=", hash[f])}
  end
  self
end
set_server(s) click to toggle source

Set the shard that this object is tied to. Returns self.

# File lib/sequel/model/base.rb, line 1517
def set_server(s)
  @server = s
  @this = @this.server(s) if @this
  self
end
singleton_method_added(meth) click to toggle source

Clear the #setter_methods cache when a method is added

Calls superclass method
# File lib/sequel/model/base.rb, line 1524
def singleton_method_added(meth)
  @singleton_setter_added = true if meth.to_s.end_with?('=')
  super
end
this() click to toggle source

Returns (naked) dataset that should return only this instance.

Artist[1].this
# SELECT * FROM artists WHERE (id = 1) LIMIT 1
# File lib/sequel/model/base.rb, line 1533
def this
  return @this if @this
  raise Error, "No dataset for model #{model}" unless ds = model.instance_dataset
  @this = use_server(ds.where(pk_hash))
end
update(hash) click to toggle source

Runs set with the passed hash and then runs save_changes.

artist.update(name: 'Jim') # UPDATE artists SET name = 'Jim' WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1542
def update(hash)
  update_restricted(hash, :default)
end
update_fields(hash, fields, opts=nil) click to toggle source

Update the instances values by calling set_fields with the arguments, then saves any changes to the record. Returns self.

artist.update_fields({name: 'Jim'}, [:name])
# UPDATE artists SET name = 'Jim' WHERE (id = 1)

artist.update_fields({hometown: 'LA'}, [:name])
# UPDATE artists SET name = NULL WHERE (id = 1)
# File lib/sequel/model/base.rb, line 1554
def update_fields(hash, fields, opts=nil)
  set_fields(hash, fields, opts)
  save_changes
end
valid?(opts = OPTS) click to toggle source

Validates the object and returns true if no errors are reported.

artist.set(name: 'Valid').valid? # => true
artist.set(name: 'Invalid').valid? # => false
artist.errors.full_messages # => ['name cannot be Invalid']
# File lib/sequel/model/base.rb, line 1573
def valid?(opts = OPTS)
  begin
    _valid?(opts)
  rescue HookFailed
    false
  end
end
validate() click to toggle source

Validates the object. If the object is invalid, errors should be added to the errors attribute. By default, does nothing, as all models are valid by default. See the “Model Validations” guide. for details about validation. Should not be called directly by user code, call valid? instead to check if an object is valid.

# File lib/sequel/model/base.rb, line 1565
def validate
end

Private Instance Methods

_add_changed_column(column) click to toggle source

Add a column as a changed column.

# File lib/sequel/model/base.rb, line 1584
def _add_changed_column(column)
  cc = _changed_columns
  cc << column unless cc.include?(column)
end
_changed_columns() click to toggle source

Internal #changed_columns method that just returns stored array.

# File lib/sequel/model/base.rb, line 1590
def _changed_columns
  @changed_columns ||= []
end
_delete() click to toggle source

Do the deletion of the object's dataset, and check that the row was actually deleted.

# File lib/sequel/model/base.rb, line 1596
def _delete
  n = _delete_without_checking
  raise(NoExistingObject, "Attempt to delete object did not result in a single row modification (Rows Deleted: #{n}, SQL: #{_delete_dataset.delete_sql})") if require_modification && n != 1
  n
end
_delete_dataset() click to toggle source

The dataset to use when deleting the object. The same as the object's dataset by default.

# File lib/sequel/model/base.rb, line 1604
def _delete_dataset
  this
end
_delete_without_checking() click to toggle source

Actually do the deletion of the object's dataset. Return the number of rows modified.

# File lib/sequel/model/base.rb, line 1610
def _delete_without_checking
  if sql = (m = model).fast_instance_delete_sql
    sql = sql.dup
    ds = use_server(m.dataset)
    ds.literal_append(sql, pk)
    ds.with_sql_delete(sql)
  else
    _delete_dataset.delete 
  end
end
_destroy(opts) click to toggle source

Internal destroy method, separted from destroy to allow running inside a transaction

# File lib/sequel/model/base.rb, line 1623
def _destroy(opts)
  called = false
  around_destroy do
    called = true
    before_destroy
    _destroy_delete
    after_destroy
  end
  raise_hook_failure(:around_destroy) unless called
  self
end
_destroy_delete() click to toggle source

Internal delete method to call when destroying an object, separated from delete to allow you to override destroy's version without affecting delete.

# File lib/sequel/model/base.rb, line 1638
def _destroy_delete
  delete
end
_insert() click to toggle source

Insert the record into the database, returning the primary key if the record should be refreshed from the database.

# File lib/sequel/model/base.rb, line 1644
def _insert
  ds = _insert_dataset
  if _use_insert_select?(ds) && !(h = _insert_select_raw(ds)).nil?
    _save_set_values(h) if h
    nil
  else
    iid = _insert_raw(ds)
    # if we have a regular primary key and it's not set in @values,
    # we assume it's the last inserted id
    if (pk = autoincrementing_primary_key) && pk.is_a?(Symbol) && !(vals = @values)[pk]
      vals[pk] = iid
    end
    pk
  end
end
_insert_dataset() click to toggle source

The dataset to use when inserting a new object. The same as the model's dataset by default.

# File lib/sequel/model/base.rb, line 1662
def _insert_dataset
  use_server(model.instance_dataset)
end
_insert_raw(ds) click to toggle source

Insert into the given dataset and return the primary key created (if any).

# File lib/sequel/model/base.rb, line 1667
def _insert_raw(ds)
  ds.insert(_insert_values)
end
_insert_select_raw(ds) click to toggle source

Insert into the given dataset and return the hash of column values.

# File lib/sequel/model/base.rb, line 1672
def _insert_select_raw(ds)
  ds.insert_select(_insert_values)
end
_refresh(dataset) click to toggle source

Refresh using a particular dataset, used inside save to make sure the same server is used for reading newly inserted values from the database

# File lib/sequel/model/base.rb, line 1681
def _refresh(dataset)
  _refresh_set_values(_refresh_get(dataset) || raise(NoExistingObject, "Record not found"))
  _changed_columns.clear
end
_refresh_get(dataset) click to toggle source

Get the row of column data from the database.

# File lib/sequel/model/base.rb, line 1687
def _refresh_get(dataset)
  if (sql = model.fast_pk_lookup_sql) && !dataset.opts[:lock]
    sql = sql.dup
    ds = use_server(dataset)
    ds.literal_append(sql, pk)
    ds.with_sql_first(sql)
  else
    dataset.first
  end
end
_refresh_set_values(h) click to toggle source

Set the values to the given hash after refreshing.

# File lib/sequel/model/base.rb, line 1699
def _refresh_set_values(h)
  @values = h
end
_save(opts) click to toggle source

Internal version of save, split from save to allow running inside it's own transaction.

# File lib/sequel/model/base.rb, line 1705
def _save(opts)
  pk = nil
  called_save = false
  called_cu = false
  around_save do
    called_save = true
    before_save

    if new?
      around_create do
        called_cu = true
        before_create
        pk = _insert
        @this = nil
        @new = false
        @modified = false
        pk ? _save_refresh : _changed_columns.clear
        after_create
        true
      end
      raise_hook_failure(:around_create) unless called_cu
    else
      around_update do
        called_cu = true
        before_update
        columns = opts[:columns]
        if columns.nil?
          if opts[:changed]
            cc = changed_columns
            columns_updated = @values.reject{|k,v| !cc.include?(k)}
            cc.clear
          else
            columns_updated = _save_update_all_columns_hash
            _changed_columns.clear
          end
        else # update only the specified columns
          columns = Array(columns)
          columns_updated = @values.reject{|k, v| !columns.include?(k)}
          _changed_columns.reject!{|c| columns.include?(c)}
        end
        _update_columns(columns_updated)
        @this = nil
        @modified = false
        after_update
        true
      end
      raise_hook_failure(:around_update) unless called_cu
    end
    after_save
    true
  end
  raise_hook_failure(:around_save) unless called_save
  self
end
_save_refresh() click to toggle source

Refresh the object after saving it, used to get default values of all columns. Separated from _save so it can be overridden to avoid the refresh.

# File lib/sequel/model/base.rb, line 1763
def _save_refresh
  _save_set_values(_refresh_get(this.server?(:default)) || raise(NoExistingObject, "Record not found"))
  _changed_columns.clear
end
_save_set_values(h) click to toggle source

Set values to the provided hash. Called after a create, to set the full values from the database in the model instance.

# File lib/sequel/model/base.rb, line 1770
def _save_set_values(h)
  @values = h
end
_save_update_all_columns_hash() click to toggle source

Return a hash of values used when saving all columns of an existing object (i.e. not passing specific columns to save or using update/save_changes). Defaults to all of the object's values except unmodified primary key columns, as some databases don't like you setting primary key values even to their existing values.

# File lib/sequel/model/base.rb, line 1780
def _save_update_all_columns_hash
  v = Hash[@values]
  cc = changed_columns
  Array(primary_key).each{|x| v.delete(x) unless cc.include?(x)}
  v
end
_update(columns) click to toggle source

Update this instance's dataset with the supplied column hash, checking that only a single row was modified.

# File lib/sequel/model/base.rb, line 1796
def _update(columns)
  n = _update_without_checking(columns)
  raise(NoExistingObject, "Attempt to update object did not result in a single row modification (SQL: #{_update_dataset.update_sql(columns)})") if require_modification && n != 1
  n
end
_update_columns(columns) click to toggle source

Call _update with the given columns, if any are present. Plugins can override this method in order to update with additional columns, even when the column hash is initially empty.

# File lib/sequel/model/base.rb, line 1790
def _update_columns(columns)
  _update(columns) unless columns.empty?
end
_update_dataset() click to toggle source

The dataset to use when updating an object. The same as the object's dataset by default.

# File lib/sequel/model/base.rb, line 1804
def _update_dataset
  this
end
_update_without_checking(columns) click to toggle source

Update this instances dataset with the supplied column hash.

# File lib/sequel/model/base.rb, line 1809
def _update_without_checking(columns)
  _update_dataset.update(columns)
end
_use_insert_select?(ds) click to toggle source

Whether to use insert_select when inserting a new row.

# File lib/sequel/model/base.rb, line 1814
def _use_insert_select?(ds)
  (!ds.opts[:select] || ds.opts[:returning]) && ds.supports_insert_select? 
end
_valid?(opts) click to toggle source

Internal validation method, running validation hooks.

# File lib/sequel/model/base.rb, line 1819
def _valid?(opts)
  return errors.empty? if frozen?
  errors.clear
  called = false
  skip_validate = opts[:validate] == false
  around_validation do
    called = true
    before_validation
    validate unless skip_validate
    after_validation
  end

  return true if skip_validate

  if called
    errors.empty?
  else
    raise_hook_failure(:around_validation)
  end
end
change_column_value(column, value) click to toggle source

Change the value of the column to given value, recording the change.

# File lib/sequel/model/base.rb, line 1860
def change_column_value(column, value)
  _add_changed_column(column)
  @values[column] = value
end
checked_save_failure(opts) { || ... } click to toggle source

If not raising on failure, check for HookFailed being raised by yielding and swallow it.

# File lib/sequel/model/base.rb, line 1842
def checked_save_failure(opts)
  if raise_on_failure?(opts)
    yield
  else
    begin
      yield
    rescue HookFailed 
      nil
    end
  end
end
checked_transaction(opts=OPTS) { || ... } click to toggle source

If transactions should be used, wrap the yield in a transaction block.

# File lib/sequel/model/base.rb, line 1855
def checked_transaction(opts=OPTS)
  use_transaction?(opts) ? db.transaction({:server=>this_server}.merge!(opts)){yield} : yield
end
errors_class() click to toggle source

Default error class used for errors.

# File lib/sequel/model/base.rb, line 1866
def errors_class
  Errors
end
initialize_clone(other) click to toggle source

Clone constructor – freeze internal data structures if the original's are frozen.

Calls superclass method
# File lib/sequel/model/base.rb, line 1872
def initialize_clone(other)
  super
  freeze if other.frozen?
  self
end
initialize_copy(other) click to toggle source

Copy constructor – Duplicate internal data structures.

Calls superclass method
# File lib/sequel/model/base.rb, line 1879
def initialize_copy(other)
  super
  @values = Hash[@values]
  @changed_columns = @changed_columns.dup if @changed_columns
  @errors = @errors.dup if @errors
  self
end
initialize_set(h) click to toggle source

Set the columns with the given hash. By default, the same as set, but exists so it can be overridden. This is called only for new records, before #changed_columns is cleared.

# File lib/sequel/model/base.rb, line 1890
def initialize_set(h)
  set(h) unless h.empty?
end
inspect_values() click to toggle source

Default inspection output for the values hash, overwrite to change what inspect displays.

# File lib/sequel/model/base.rb, line 1895
def inspect_values
  @values.inspect
end
raise_hook_failure(type=nil) click to toggle source

Raise an error appropriate to the hook type. May be swallowed by #checked_save_failure depending on the raise_on_failure? setting.

# File lib/sequel/model/base.rb, line 1909
def raise_hook_failure(type=nil)
  msg = case type
  when String
    type
  when Symbol
    "the #{type} hook failed"
  else
    "a hook failed"
  end

  raise HookFailed.new(msg, self)
end
raise_on_failure?(opts) click to toggle source

Whether to raise or return false if this action fails. If the :raise_on_failure option is present in the hash, use that, otherwise, fallback to the object's raise_on_save_failure (if set), or class's default (if not).

# File lib/sequel/model/base.rb, line 1903
def raise_on_failure?(opts)
  opts.fetch(:raise_on_failure, raise_on_save_failure)
end
schema_type_class(column) click to toggle source

Get the ruby class or classes related to the given column's type.

# File lib/sequel/model/base.rb, line 1923
def schema_type_class(column)
  if (sch = db_schema[column]) && (type = sch[:type])
    db.schema_type_class(type)
  end
end
set_restricted(hash, type) click to toggle source

Call setter methods based on keys in hash, with the appropriate values. Restrict which methods can be called based on the provided type.

# File lib/sequel/model/base.rb, line 1931
def set_restricted(hash, type)
  return self if hash.empty?
  meths = setter_methods(type)
  strict = strict_param_setting
  hash.each do |k,v|
    m = "#{k}="
    if meths.include?(m)
      set_column_value(m, v)
    elsif strict
      # Avoid using respond_to? or creating symbols from user input
      if public_methods.map(&:to_s).include?(m)
        if Array(model.primary_key).map(&:to_s).member?(k.to_s) && model.restrict_primary_key?
          raise MassAssignmentRestriction, "#{k} is a restricted primary key"
        else
          raise MassAssignmentRestriction, "#{k} is a restricted column"
        end
      else
        raise MassAssignmentRestriction, "method #{m} doesn't exist"
      end
    end
  end
  self
end
setter_methods(type) click to toggle source

Returns all methods that can be used for attribute assignment (those that end with =), depending on the type:

:default

Use the default methods allowed in the model class.

:all

Allow setting all setters, except those specifically restricted (such as ==).

Array

Only allow setting of columns in the given array.

# File lib/sequel/model/base.rb, line 1961
def setter_methods(type)
  if type == :default && !@singleton_setter_added
    return model.setter_methods
  end

  meths = methods.map(&:to_s).select{|l| l.end_with?('=')} - RESTRICTED_SETTER_METHODS
  meths -= Array(primary_key).map{|x| "#{x}="} if primary_key && model.restrict_primary_key?
  meths
end
this_server() click to toggle source

The server/shard that the model object's dataset uses, or :default if the model object's dataset does not have an associated shard.

# File lib/sequel/model/base.rb, line 1973
def this_server
  if (s = @server)
    s
  elsif (t = @this)
    t.opts[:server] || :default
  else
    model.dataset.opts[:server] || :default
  end
end
typecast_value(column, value) click to toggle source

Typecast the value to the column's type if typecasting. Calls the database's #typecast_value method, so database adapters can override/augment the handling for database specific column types.

# File lib/sequel/model/base.rb, line 1986
def typecast_value(column, value)
  return value unless typecast_on_assignment && db_schema && (col_schema = db_schema[column])
  value = nil if '' == value and typecast_empty_string_to_nil and col_schema[:type] and ![:string, :blob].include?(col_schema[:type])
  raise(InvalidValue, "nil/NULL is not allowed for the #{column} column") if raise_on_typecast_failure && value.nil? && (col_schema[:allow_null] == false)
  begin
    model.db.typecast_value(col_schema[:type], value)
  rescue InvalidValue
    raise_on_typecast_failure ? raise : value
  end
end
update_restricted(hash, type) click to toggle source

Set the columns, filtered by the only and except arrays.

# File lib/sequel/model/base.rb, line 1998
def update_restricted(hash, type)
  set_restricted(hash, type)
  save_changes
end
use_server(ds) click to toggle source

Set the given dataset to use the current object's shard.

# File lib/sequel/model/base.rb, line 2004
def use_server(ds)
  @server ? ds.server(@server) : ds
end
use_transaction?(opts = OPTS) click to toggle source

Whether to use a transaction for this action. If the :transaction option is present in the hash, use that, otherwise, fallback to the object's default (if set), or class's default (if not).

# File lib/sequel/model/base.rb, line 2011
def use_transaction?(opts = OPTS)
  opts.fetch(:transaction, use_transactions)
end